Cutting insert



FIG. 1 is a front, top perspective view of the cutting insert showing our new design;

FIG. 2 is a top plan view thereof, the bottom plan view being identical;

FIG. 3 is a front elevational view thereof; and,

FIG. 4 is a right side elevational view thereof, the left side elevational view being identical. 

The ornamental design for a cutting insert, as shown and described. 